The Sonnax 10-clutch system increases lockup surface in GM Powerglides for significantly more torque capacity than modified OE drums. The drum and piston accept 10 .060" frictions and 10 .060" thick steels increasing lockup surface to allow significantly more torque than modified OE drums.

Sonnax 10-clutch drum, hub and piston kit 28756-15K includes the three essential components for building a 10-clutch drum assembly. An alternative kit, 28756-16K, includes a pump-to-drum bearing.

• Patented drum, hub and piston system improves clutch capacity for maximum durability
• High-strength drum with reduced rotating mass improves on-track acceleration
• 6061 Forged piston will not crack like cast pistons
• Forged chromoly clutch hub guarantees your power makes it to the wheels